SEC Form 4 reporting owner

Sandbrook William J

Sandbrook William J has filed 4 Form 4 transactions reported between February 24, 2026 and May 20, 2026, as Director of Knife River Corp and a reporting owner of COMFORT SYSTEMS USA INC.

Name as filed: SANDBROOK WILLIAM J

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$6.2M
2 lines
Companies
2
with Form 4 filings
Latest transaction
May 20, 2026
transaction date

Roles and reported holdings

  • KNFKnife River Corp
    May 20, 2026

    Director

    No common-stock holding reported on a purchase, sale, gift or withholding line.

  • FIXCOMFORT SYSTEMS USA INC
    Feb 24, 2026 – May 18, 2026

    Reporting owner

    Held directly7,666 sh as of Apr 29, 2026 · Form 4

    24 months: $6.2M sold

Transaction history

All 4 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
May 20, 2026KNFDirectorGrant or awardCode A · direct2,040—Form 4
May 18, 2026FIXGrant or awardCode A · direct105—Form 4
Apr 29, 2026FIXOpen-market saleCode S · direct1,500$2.6M@ $1732.67Form 4
Feb 24, 2026FIXOpen-market saleCode S · direct2,500$3.6M@ $1443.32Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.